We are a group of friends that would like to continue our Seudas Moshiach on Zoom Motzoei Yom Tov if possible. Is this permissible?

You may say Boruch Hamavdil and then do Melacha (zoom etc.) and continue eating, however you will not be able to say Yale Veyovo in Bentching.

Ato Chonantanu should still be recited during Maariv.

Remember to make Havdala afterwards on wine.